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RT8010C
1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC Converter
General Description
Features
2.5V to 5.5V Input Voltage Range
Output Voltage (Adjustable Output From 0.6V to VIN)
1A Output Current
Up to 95% Efficiency
No Schottky Diode Required
1.5MHz Fixed Switching Frequency
Current Limit
Input UVLO Protection
Thermal Shutdown
Small 6-Lead WDFN Package
RoHS Compliant and Halogen Free
The RT8010C is a high efficiency Pulse-Width-Modulated
(PWM) step-down DC/DC converter, and is capable of
delivering 1A output current over a wide input voltage range
from 2.5V to 5.5V. The RT8010C is ideally suited for
portable electronic devices that are powered from 1-cell
Li-ion battery or from other power sources such as cellular
phones, PDAs and hand-held devices.
Two operating modes are available including : PWM/LowDropout autoswitch and shutdown modes. The Internal
synchronous rectifier with low RDS(ON) dramatically reduces
conduction loss at PWM mode. No external Schottky
diode is required in practical application.
Applications
The RT8010C enters Low Dropout mode when normal
PWM cannot provide regulated output voltage by
continuously turning on the upper P-MOSFET. RT8010C
enters shut-down mode and consumes less than 0.1μA
when the EN pin is pulled low.
Mobile Phones
Personal Information Appliances
Wireless and DSL Modems
MP3 Players
Portable Instruments
The switching ripple is easily smoothed-out by small
package filtering elements due to a fixed operating
frequency of 1.5MHz. Small WDFN-6L 2x2 package
provides small PCB area application. Other features include
soft start, lower internal reference voltage with 2%
accuracy, over temperature protection, and over current
protection.
Ordering Information
RT8010C
Package Type
QW : WDFN-6L 2x2 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Marking Information
Richtek products are :
1E : Product Code
1EW
`
W : Date Code
RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
`
Suitable for use in SnPb or Pb-free soldering processes.
Simplified Application Circuit
L
VIN
VIN
CIN
LX
RT8010C
EN
VOUT
COUT
VOUT
GND
Copyright © 2012 Richtek Technology Corporation. All rights reserved.
DS8010C-00
September 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
RT8010C
Pin Configurations
NC
1
EN
VIN
2
GND
(TOP VIEW)
3
7
6
FB/VOUT
5
GND
LX
4
WDFN-6L 2x2
Functional Pin Description
Pin No.
Pin Name
Pin Function
1
NC
No Internal Connection. Leave floating or connect to ground.
2
EN
Chip Enable (Active High).
3
VIN
Power Input.
4
LX
5,
GND
7 (Exposed Pad)
6
FB/VOUT
Switch Node. Connect this pin to the external inductor.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
Feedback/Output Voltage Sense Input.
Function Block Diagram
EN
VIN
RS1
OSC &
Shutdown
Control
Current
Limit
Detector
Slope
Compensation
Current
Sense
FB/VOUT
Error
Amplifier
PWM
Comparator
UVLO &
Power Good
Detector
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2
Control
Logic
Driver
LX
RS2
GND
VREF
is a registered trademark of Richtek Technology Corporation.
DS8010C-00
September 2012
RT8010C
Operation
The RT8010C is a synchronous step-down DC/DC converter
with two integrated power MOSFETs and operates at
1.5MHz fixed frequency. Daring normal operation, the
internal high side power switch (P-MOSFET) is turned
on at the beginning of each clock cycle. Current in the
inductor increases until the peak inductor current reaches
the value defined by the output voltage of the error amplifier.
The error amplifier adjusts its output voltage by comparing
the feedback signal on the FB pin with an internal 0.6V
reference. When the load current increases, it causes a
drop in the feedback voltage relative to the reference, and
the COMP voltage will rise to allow higher inductor current
to match the load current.
OSC
Over Temperature Protection (OTP)
The RT8010C implement an internal over temperature
protection. When junction temperature is higher than
160°C, it will stop switching. Once the junction
temperature cools down, the RT8010C will automatically
resume switching.
Enable Comparator
A logic-high enable the converter, a logic-low forces the
IC into shutdown mode.
Soft-Start (SS)
An internal current source charges an internal capacitor
to build the soft-start ramp voltage. The FB voltage will
track the internal ramp voltage during the soft-start interval.
The internal oscillator typically runs at 1.5 MHz switching
frequency.
Copyright © 2012 Richtek Technology Corporation. All rights reserved.
DS8010C-00
September 2012
is a registered trademark of Richtek Technology Corporation.
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RT8010C
Absolute Maximum Ratings
(Note 1)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------EN, FB Pin Voltage ------------------------------------------------------------------------------------------------LX Pin Switch Voltage ---------------------------------------------------------------------------------------------<20ns -----------------------------------------------------------------------------------------------------------------LX Pin Switch Current ---------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C
WDFN-6L 2x2 -------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2)
WDFN-6L 2x2, θJA --------------------------------------------------------------------------------------------------WDFN-6L 2x2, θJC -------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------Junction Temperature ----------------------------------------------------------------------------------------------ESD Susceptibility (Note 3)
HBM (Human Body Model) ----------------------------------------------------------------------------------------
Recommended Operating Conditions
6.5V
−0.3V to VIN
−0.3V to (VIN + 0.3V)
−4.5V to 7.5V
2A
0.833W
120°C/W
8°C/W
260°C
−65°C to 150°C
150°C
2kV
(Note 4)
Supply Input Voltage ------------------------------------------------------------------------------------------------ 2.5V to 5.5V
Junction Temperature Range -------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 3.6V, VOUT = 2.5V, L = 2.2μH, CIN = 4.7μF, COUT = 10μF, TA = 25°C, IMAX = 1A unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
2.5
--
5.5
V
Input Voltage Range
VIN
Quiescent Current
IQ
IOUT = 0mA, VFB = VREF + 5%
--
50
70
μA
Shutdown Current
ISHDN
EN = GND
--
1
10
μA
Reference Voltage
VREF
For Adjustable Output Voltage
0.588
0.6
0.612
V
Adjustable Output Range
VOUT
(Note 5)
VREF
--
VIN − 0.2V
V
Output Voltage
Accuracy
ΔVOUT
VIN = VOUT + ΔV to 5.5V
0A < IOUT < 1A
−3
--
3
%
FB Input Current
IFB
VFB = VIN
−50
--
50
nA
0.28
--
RDS(ON)_P
IOUT = 200mA
VIN = 3.6V
--
P-MOSFET RON
VIN = 2.5V
--
0.38
--
0.25
--
RDS(ON)_N
IOUT = 200mA
VIN = 3.6V
--
N-MOSFET RON
VIN = 2.5V
--
0.35
--
P-Channel Current Limit
ILIM_P
VIN = 2.5V to 5.5V
1.4
1.5
--
Logic-High VEN_H
VIN = 2.5V to 5.5V
1.5
--
VIN
Logic-Low VEN_L
VIN = 2.5V to 5.5V
--
--
0.4
EN Input Voltage
Adjustable
Copyright © 2012 Richtek Technology Corporation. All rights reserved.
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4
(Note 6)
Ω
Ω
A
V
is a registered trademark of Richtek Technology Corporation.
DS8010C-00
September 2012
RT8010C
Parameter
Symbol
Min
Typ
Max
Unit
Under Voltage Lockout Threshold UVLO
--
1.8
--
V
UVLO Hysteresis
--
0.1
--
V
1.2
1.5
1.8
MHz
--
160
--
°C
100
--
--
%
−1
--
1
μA
Oscillator Frequency
fOSC
Thermal Shutdown Temperature
TSD
Test Conditions
VIN = 3.6V, IOUT = 100mA
Maximum Duty Cycle
LX Leakage Current
VIN = 3.6V, VLX = 0V or VLX = 3.6V
Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may
affect device reliability.
Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is
measured at the exposed pad of the package.
Note 3. Devices are ESD sensitive. Handling precaution recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Note 5. Guarantee by design.
Note 6. ΔV = IOUT x PRDS(ON)
Copyright © 2012 Richtek Technology Corporation. All rights reserved.
DS8010C-00
September 2012
is a registered trademark of Richtek Technology Corporation.
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RT8010C
Typical Application Circuit
VIN
2.5V to 5.5V
3
CIN
4.7µF
LX
VIN
4
L
2.2µH
VOUT
COUT
10µF
RT8010C
2
EN
VOUT
6
GND
5
Figure 1. Fixed Output Voltage
VIN
2.5V to 5.5V
3
CIN
4.7µF
L
2.2µH
VIN
LX
EN
FB
GND
5
⎛
⎝
VOUT
C1
RT8010C
2
VOUT = VREF × ⎜ 1 +
4
R1
COUT
10µF
6
IR2
R2
R1 ⎞
⎟
R2 ⎠
with R2 = 300kΩ to 60kΩ so the IR2 = 2μA to 10μA,
and (R1 x C1) should be in the range between 3x10−6 and 6x10−6 for component selection.
Figure 2. Adjustable Output Voltage
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is a registered trademark of Richtek Technology Corporation.
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September 2012
RT8010C
Typical Operating Characteristics
Efficiency vs. Output Current
Efficiency vs. Output Current
100
100
90
80
80
70
Efficiency (%)
Efficiency (%)
90
VIN = 3.6V
VIN = 4.2V
VIN = 5V
60
50
40
30
70
VIN = 5V
VIN = 3.3V
VIN = 2.5V
60
50
40
30
20
20
10
10
VOUT = 3.3V, COUT = 4.7μF, L = 4.7μH
VOUT = 1.2V, COUT = 4.7μF, L = 4.7μH
0
0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
0
1
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Output Current (A)
Output Current (A)
Efficiency vs. Output Current
UVLO Voltage vs. Temperature
100
2.0
90
1.9
Rising
70
Input Voltage (V)
Efficiency (%)
80
VIN = 5V
VIN = 3.3V
VIN = 2.5V
60
50
40
30
1.8
1.7
1.6
Falling
1.5
1.4
20
1.3
10
VOUT = 1.2V, IOUT = 0A
VOUT = 1.2V, COUT = 10μF, L = 2.2μH
0
1.2
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
-40 -25 -10
5
1.5
1.5
1.4
1.4
EN Pin Threshold (V)
EN Pin Threshold (V)
1.6
1.3
1.2
1.1
Rising
0.9
0.8
35
50
65
80
95 110 125
EN Pin Threshold vs. Temperature
EN Pin Threshold vs. Input Voltage
1.6
1.0
20
Temperature (°C)
Output Current (A)
Falling
0.7
1.3
1.2
1.1
1.0
Rising
0.9
0.8
Falling
0.7
0.6
0.6
0.5
VOUT = 1.2V, IOUT = 0A
0.5
VIN = 3.6V, VOUT = 1.2V, IOUT = 0A
0.4
0.4
2.5
2.8
3.1
3.4
3.7
4
4.3
4.6
4.9
5.2
Input Voltage (V)
Copyright © 2012 Richtek Technology Corporation. All rights reserved.
DS8010C-00
September 2012
5.5
-40 -25 -10
5
20
35
50
65
80
95 110 125
Temperature (°C)
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RT8010C
Output Voltage vs. Temperature
1.25
1.24
1.24
1.23
1.23
1.22
Output Voltage (V)
Output Voltage (V)
Output Voltage vs. Load Current
1.25
VIN = 5V
1.21
VIN = 3.6V
1.20
1.19
1.18
1.22
1.21
1.20
1.19
1.18
1.17
1.17
1.16
1.16
1.15
1.15
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
VIN = 3.6V, IOUT = 0A
-40 -25 -10
5
35
50
65
80
95 110 125
Frequency vs. Temperature
1.60
1.60
1.55
1.55
1.50
1.50
Frequency (kHz)1
Frequency (kHz)
Frequency vs. Input Voltage
1.45
1.40
1.35
1.30
1.45
1.40
1.35
1.30
1.25
1.25
VIN = 3.6V, VOUT = 1.2V, IOUT = 300mA
VIN = 3.6V, VOUT = 1.2V, IOUT = 300mA
1.20
1.20
2.5
2.8
3.1
3.4
3.7
4
4.3
4.6
4.9
5.2
-40 -25 -10
5.5
5
Output Current Limit vs. Input Voltage
35
50
65
80
95 110 125
Output Current Limit vs. Temperature
2.6
2.5
2.5
2.4
2.4
Output Current Limit (A)
2.6
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
20
Temperature (°C)
Input Voltage (V)
Output Current Limit (A)
20
Temperature (°C)
Load Current (A)
VOUT = 1.2V @ TA = 20°C
1.5
2.3
VIN = 5V
VIN = 3.6V
2.2
2.1
VIN = 3.3V
2.0
1.9
1.8
1.7
1.6
VOUT = 1.2V
1.5
2.5
2.8
3.1
3.4
3.7
4
4.3
4.6
4.9
5.2
Input Voltage (V)
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5.5
-40 -25 -10
5
20
35
50
65
80
95 110 125
Temperature (°C)
is a registered trademark of Richtek Technology Corporation.
DS8010C-00
September 2012
RT8010C
Power On from EN
Power On from EN
VIN = 3.6V, VOUT = 1.2V, IOUT = 10mA
VIN = 3.6V, VOUT = 1.2V, IOUT = 1A
VEN
(2V/Div)
VEN
(2V/Div)
VOUT
(1V/Div)
VOUT
(1V/Div)
I IN
(500mA/Div)
I IN
(500mA/Div)
Time (100μs/Div)
Time (100μs/Div)
Load Transient Response
Load Transient Response
VIN = 3.6V, VOUT = 1.2V
IOUT = 50mA to 0.5A
VIN = 3.6V, VOUT = 1.2V
IOUT = 50mA to 1A
VOUT ac
(50mV/Div)
VOUT ac
(50mV/Div)
IOUT
(500mA/Div)
IOUT
(500mA/Div)
Time (50μs/Div)
Time (50μs/Div)
Load Transient Response
Load Transient Response
VIN = 5V, VOUT = 1.2V
IOUT = 50mA to 0.5A
VIN = 5V, VOUT = 1.2V
IOUT = 50mA to 1A
VOUT ac
(50mV/Div)
VOUT ac
(50mV/Div)
IOUT
(500mA/Div)
IOUT
(500mA/Div)
Time (50μs/Div)
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DS8010C-00
September 2012
Time (50μs/Div)
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RT8010C
Output Ripple Voltage
Output Ripple Voltage
VIN = 3.6V, VOUT = 1.2V
IOUT = 1A
VIN = 5V, VOUT = 1.2V
IOUT = 1A
VOUT
(10mV/Div)
VOUT
(10mV/Div)
VLX
(2V/Div)
VLX
(2V/Div)
Time (500ns/Div)
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Time (500ns/Div)
is a registered trademark of Richtek Technology Corporation.
DS8010C-00
September 2012
RT8010C
Applications Information
The basic RT8010C application circuit is shown in Typical
Application Circuit. External component selection is
determined by the maximum load current and begins with
the selection of the inductor value and operating frequency
followed by CIN and COUT.
Inductor Selection
For a given input and output voltage, the inductor value
and operating frequency determine the ripple current. The
ripple current ΔIL increases with higher VIN and decreases
with higher inductance.
V
V
ΔIL = ⎡⎢ OUT ⎤⎥ × ⎡⎢1− OUT ⎤⎥
VIN ⎦
⎣ f ×L ⎦ ⎣
Having a lower ripple current reduces the ESR losses in
the output capacitors and the output voltage ripple. Highest
efficiency operation is achieved at low frequency with small
ripple current. This, however, requires a large inductor.
A reasonable starting point for selecting the ripple current
is ΔIL = 0.4(IMAX). The largest ripple current occurs at the
highest VIN. To guarantee that the ripple current stays
below a specified maximum, the inductor value should be
chosen according to the following equation :
⎡ VOUT ⎤ ⎡
VOUT ⎤
L= ⎢
⎥ × ⎢1 − VIN(MAX) ⎥
f
I
×
Δ
L(MAX)
⎣
⎦ ⎣
⎦
Using Ceramic Input and Output Capacitors
Higher values, lower cost ceramic capacitors are now
becoming available in smaller case sizes. Their high ripple
current, high voltage rating and low ESR make them ideal
for switching regulator applications. However, care must
be taken when these capacitors are used at the input and
output. When a ceramic capacitor is used at the input
and the power is supplied by a wall adapter through long
wires, a load step at the output can induce ringing at the
input, VIN. The ringing can couple with the output and be
mistaken as loop instability. At worst, a sudden inrush of
current through the long wires can potentially cause a
voltage spike at VIN large enough to damage the part.
Output Voltage Setting
The resistive divider allows the FB pin to sense a fraction
of the output voltage as shown in Figure 3.
Copyright © 2012 Richtek Technology Corporation. All rights reserved.
DS8010C-00
September 2012
VOUT
R1
FB
RT8010C
R2
GND
Figure 3. Setting the Output Voltage
For adjustable voltage mode, the output voltage is set by
an external resistive divider according to the following
equation :
VOUT = VREF ⎛⎜ 1+ R1 ⎞⎟
⎝ R2 ⎠
where VREF is the internal reference voltage (0.6V typ.)
Thermal Considerations
The maximum power dissipation depends on the thermal
resistance of IC package, PCB layout, the rate of
surroundings airflow and temperature difference between
junction to ambient. The maximum power dissipation can
be calculated by following formula :
PD(MAX) = (TJ(MAX) − TA) / θJA
Where T J(MAX) is the maximum operation junction
temperature, TA is the ambient temperature and the θJA is
the junction to ambient thermal resistance.
For recommended operating conditions specification of
RT8010C DC/DC converter, where TJ(MAX) is the maximum
junction temperature of the die and TA is the maximum
ambient temperature. The junction to ambient thermal
resistance θJA is layout dependent. For WDFN-6L 2x2
package, the thermal resistance θJA is 120°C/W on the
standard JEDEC 51-7 four layers thermal test board.
The maximum power dissipation at TA = 25°C can be
calculated by following formula :
PD(MAX) = (125°C − 25°C) / 120°C/W = 0.833W for
WDFN-6L 2x2 package
The maximum power dissipation depends on operating
ambient temperature for fixed T J(MAX) and thermal
resistance θJA.
The derating curve in Figure 4 of derating curves allows
the designer to see the effect of rising ambient temperature
on the maximum power allowed.
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RT8010C
Maximum Power Dissipation (W)
1.6
Four-Layers PCB
VIN
1.4
1.2
C2
1
1.0
NC
C1
2
EN
R1
6
FB/VOUT
0.8
VOUT
L1
RT8010C
3
4
VIN
LX
C3
5
GND
R2
0.6
VIN
0.4
0.2
R3
0.0
0
25
50
75
100
125
Figure 5. EVB Schematic
Ambient Temperature (°C)
Figure 4. Derating Curve of Maximum Power Dissipation
Checking Transient Response
The regulator loop response can be checked by looking
at the load transient response. Switching regulators take
several cycles to respond to a step in load current. When
a load step occurs, VOUT immediately shifts by an amount
equal to ΔILOAD (ESR), where ESR is the effective series
resistance of COUT. ΔILOAD also begins to charge or
discharge COUT generating a feedback error signal used
by the regulator to return VOUT to its steady-state value.
During this recovery time, VOUT can be monitored for
overshoot or ringing that would indicate a stability problem.
RT8010C_FIX
NC
1
6 VOUT
EN
2
5 GND
VIN
3
4 LX
L1
COUT
CIN
LX should be connected
to Inductor by wide and
short trace, keep sensitive
components away from
this trace
CIN must be placed
to the VIN as close
as possible.
Place the feedback
components close
to the FB pin.
Layout Considerations
Follow the PCB layout guidelines for optimal performance
of RT8010C.
`
`
`
`
`
For the main current paths as indicated in bold lines in
Figure 5, keep these traces short and wide.
Put the input capacitor as close as possible to the device
pins (VIN and GND).
LX node is with high frequency voltage swing and should
be kept within small area. Keep analog components
away from LX node to prevent stray capacitive noise
pick-up.
Connect feedback network behind the output capacitors.
Keep the loop area small. Place the feedback
components near the RT8010C.
Output capacitor
must be near
RT8010
RT8010C_ADJ
R2
NC
1
6 FB
EN
2
5 GND
VIN
3
4 LX
R1
L1
COUT
CIN
CIN must be placed
to the VIN as close
as possible.
LX should be connected
to Inductor by wide and
short trace, keep sensitive
components away from
this trace
Figure 6. PCB Layout Guide
An example of 2-layer PCB layout is shown in Figure 6
for reference.
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is a registered trademark of Richtek Technology Corporation.
DS8010C-00
September 2012
RT8010C
Table 1. Recommended Inductors
Supplier
Inductance (μH)
Current Rating (mA) DCR (mΩ)
Dimensions (mm)
Series
TAIYO YUDEN
2.2
1480
60
3.00 x 3.00 x 1.50
NR 3015
GOTREND
2.2
1500
58
3.85 x 3.85 x 1.80
GTSD32
Sumida
2.2
1500
75
4.50 x 3.20 x 1.55
CDRH2D14
Sumida
4.7
1000
135
4.50 x 3.20 x 1.55
CDRH2D14
TAIYO YUDEN
4.7
1020
120
3.00 x 3.00 x 1.50
NR 3015
GOTREND
4.7
1100
146
3.85 x 3.85 x 1.80
GTSD32
Table 2. Recommended Capacitors for CIN and COUT
Supplier
Capacitance (μF)
Package
Part Number
TDK
4.7
0603
C1608JB0J475M
MURATA
4.7
0603
GRM188R60J475KE19
TAIYO YUDEN
4.7
0603
JMK107BJ475RA
TAIYO YUDEN
10
0603
JMK107BJ106MA
TDK
10
0805
C2012JB0J106M
MURATA
10
0805
GRM219R60J106ME19
MURATA
10
0805
GRM219R60J106KE19
TAIYO YUDEN
10
0805
JMK212BJ106RD
Copyright © 2012 Richtek Technology Corporation. All rights reserved.
DS8010C-00
September 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
13
RT8010C
Outline Dimension
D2
D
L
E
E2
1
e
b
A
A1
SEE DETAIL A
2
1
2
1
A3
DETAIL A
Pin #1 ID and Tie Bar Mark Options
Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
0.700
0.800
0.028
0.031
A1
0.000
0.050
0.000
0.002
A3
0.175
0.250
0.007
0.010
b
0.200
0.350
0.008
0.014
D
1.950
2.050
0.077
0.081
D2
1.000
1.450
0.039
0.057
E
1.950
2.050
0.077
0.081
E2
0.500
0.850
0.020
0.033
e
L
0.650
0.300
0.026
0.400
0.012
0.016
W-Type 6L DFN 2x2 Package
Richtek Technology Corporation
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789
Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should
obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot
assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be
accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries.
www.richtek.com
14
DS8010C-00
September 2012